Today Apple Reinvented The Wheel
.. Literally, and they call it Digital Crown
Apple website:
Every new product we’ve introduced has been defined by a unique input device. With Apple Watch, it’s the Digital Crown. On mechanical watches, the crown has historically been used to set the time and date and to wind the mainspring. We reimagined it as a versatile tool that answers the fundamental challenge of how to magnify content on a small display.